Fix compile error with theoretically supported versions of libcurl < 7.12.3.

NEWS

@@ -11,6 +11,8 @@ PHP                                                                        NEWS
 
 - cURL:
   . Fixed bug #66109 (Can't reset CURLOPT_CUSTOMREQUEST to default behaviour) (Tjerk)
+  . Fix compilation on libcurl versions between 7.10.5 and 7.12.2, inclusive.
+    (Adam)
 
 - GD:
   . Fixed bug #66714 ( imageconvolution breakage). (Brad Daily)

ext/curl/interface.c

@@ -3142,6 +3142,7 @@ PHP_FUNCTION(curl_getinfo)
 						}
 						break;
 					}
+#if LIBCURL_VERSION_NUM >= 0x070c03 /* Available since 7.12.3 */
 					case CURLINFO_SLIST:
 					{
 						struct curl_slist *slist;
@@ -3157,6 +3158,7 @@ PHP_FUNCTION(curl_getinfo)
 						}
 						break;
 					}
+#endif
 					default:
 						RETURN_FALSE;
 				}